Billboard Hot 100: 56 years of No. 1 songs

The Billboard Hot 100 singles chart made its debut 56 years ago on Aug. 4, 1958, with Ricky Nelson's "Poor Little Fool" topping that initial chart. In honor of the anniversary, take a year-by-year look at each chart-topper from each Hot 100 year-end list since then.

The Billboard Hot 100 singles chart made its debut 56 years ago on Aug. 4, 1958, with Ricky Nelson's "Poor Little Fool" topping that initial chart. In honor of the anniversary, take a year-by-year look at each chart-topper from each Hot 100 year-end list since then.